<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
		 <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
		   <swiper-item v-for="(item,i) in goods_info.pics" :key="i" @click="preview(i)">
		     <image :src="item.pics_big" ></image>
		   </swiper-item>
		 </swiper>
     <!-- 商品信息区域 -->
     <view class="goods-info-box">
       <!-- 商品价格 -->
        <view class="goods-price">
          ¥{{goods_info.goods_price}}
        </view>
        <!-- 信息主题区域 -->
        <view class="goods-info-body">
          <!-- 商品名称 -->
           <view class="goods-name">
             {{goods_info.goods_name}}
           </view>
           <!-- 收藏 -->
           <view class="favi">
             <uni-icons type="star" size="18" cloor="gray"></uni-icons>
             <text>收藏</text>
           </view>
        </view>
        <view class="yf">
          <text>运费：免运费</text>
        </view>
     </view>
	   
     <!-- 商品详情信息 -->
     <rich-text :nodes="goods_info.goods_introduce"></rich-text>
     
     <view class="goods-nav">
        <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
     </view>
  </view>
</template>

<script>
  import { mapState ,mapMutations, mapGetters} from 'vuex'
	export default {
    computed:{
      //调用mapState方法，将 m_cart模块中cart数组映射到当前页面中，作为计算属性来使用
      ...mapState('m_cart', []),
      ...mapGetters('m_cart',['total'])
    },
    watch:{
      // total(newValue){
      //   const findResult= this.options.find(x=>x.text==='购物车')
      //   if(findResult){
      //             // 3. 动态为购物车按钮的 info 属性赋值
      //     findResult.info = newValue
      //   }
      // }
      total:{
        handler(newVal){
            const findResult= this.options.find(x=>x.text==='购物车')
            if(findResult){
                      // 3. 动态为购物车按钮的 info 属性赋值
              findResult.info = newVal
            }
        },
        immediate:true
      }
    },
		data() {
			return {
				goods_info:{},
        options: [ {
        					icon: 'shop',
        					text: '店铺',
        					info: 2,
        				  infoBackgroundColor: '#007aff',
        					infoColor: "#f5f5f5"
        				}, {
        					icon: 'cart',
        					text: '购物车',
        					info: 0
        				}],
        buttonGroup: [{
              text: '加入购物车',
              backgroundColor: '#ff0000',
              color: '#fff'
            },
            {
              text: '立即购买',
              backgroundColor: '#ffa200',
              color: '#fff'
            }
            ]
			};
		},
    onLoad(options){
      const goods_id = options.goods_id
      this.getGoodsDetail(goods_id)
    },
    methods:{
      ...mapMutations('m_cart',['addToCart']),
      async getGoodsDetail(goods_id){
          const {data:res} = await uni.$http.get('/api/public/v1/goods/detail',{'goods_id':goods_id})
          if(res.meta.status !== 200) return uni.$showMessage()
            // 使用字符串的 replace() 方法，为 img 标签添加行内的 style 样式，从而解决图片底部空白间隙的问题
          res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block;" ') 
         res.message.goods_introduce = res.message.goods_introduce.replace(/webp/g,'jpg')
          this.goods_info = res.message
          
      },
      preview(i){
        uni.previewImage({
          //默认显示图片的 索引
          current:i,
          urls: this.goods_info.pics.map(x=>x.pics_big)
        })
      },
      onClick(e){
         // console.log(e)
         if(e.content.text==='购物车'){
           uni.switchTab({
             url:"/pages/Cart/Cart"
           })
         }
      },
      buttonClick(e){
        // console.log(e)
        // 1. 判断是否点击了 加入购物车 按钮
        if(e.content.text==='加入购物车'){
          // 组织一个一个商品对象
            // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
          const goods={
            goods_id:this.goods_info.goods_id,
            goods_name:this.goods_info.goods_name,
            goods_price:this.goods_info.goods_price,
            goods_count:1,
            goods_small_logo:this.goods_info.goods_small_logo,
            goods_state:true
          }
           // 3. 通过 this 调用映射过来的 addToCart 方法，把商品信息对象存储到购物车中
          this.addToCart(goods)
        }
   
      }
      
    }
	}
</script>

<style lang="scss">
swiper{
  height: 750rpx;
  
  image{
    height: 100%;
    width: 100%;
  }
}
.goods-info-box{
  padding:10px;
  padding-right: 0;
  .goods-price{
    font-size: 18px;
    color: #C00000;
    margin: 10px 0;
  }
  .goods-info-body{
    display: flex;
    justify-content: space-between;
    // margin: 5px 0;
    .goods-name{
      font-size: 13px;
      padding-right: 10px;
    }
    .favi{
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      width: 120rpx;
      font-size: 12px;
      color: gray;
      border-left: 1px solid #efefef;
    }
  }
  .yf{
    font-size: 12px;
    color: gray;
    margin: 10px 0;
  }
}
.goods-detail-container{
  padding-bottom: 50px;
}
.goods-nav{
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
}


</style>
